Advertisements
Advertisements
प्रश्न
Write the formula of the following compound:
Sodium carbonate
Write the formula of sodium carbonate.
Advertisements
उत्तर
Na2CO3
संबंधित प्रश्न
Write the chemical formula of the Copper nitrate.
Fill the following blanks with suitable words :
In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called ....................
What is meant by the symbol of an element ? Explain with examples.
Explain the difference between 2N and N2.
Name the elements water is made of. What are the valencies of these elements ? Work out the chemical
formula for water.
Give the empirical formula of Glucose C6H12O6 .
Identify the following substance:
A brown gas D with the irritating smell.
Name the element in the compound and give the formula of the following compound:
Acetic acid
Write the formula of the following compound:
Potassium iodide
Write the formula of the following compound:
Calcium bisulphite
Write the formula of the following compound:
Magnesium sulphate
Write the formula of the following compound:
Magnesium bicarbonate
Write the formula of the following compound:
Aluminium hydroxide
Write the formula of the following compound:
Tetra amine copper [II] sulphate
Write the formula of the following compound:
Iron [II] sulphate
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
Ca2(PO4)3
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
NaClO
Write the molecular formulae for the following compounds
Aluminium (III) nitrate
Write the molecular formulae of all the compounds that can be formed by the combination of the following ions
Cu2+, Na+, Fe3+, C1– , `"SO"_4^-2`, `"PO"_4^3-`
Complete the following crossword puzzle (Fig. 3.1) by using the name of the chemical elements. Use the data given in Table.
| Across | Down | ||
| 2 | The element used by Rutherford during his α–scattering experiment | 1 | A white lustrous metal used for making ornaments and which tends to get tarnished black in the presence of moist air |
| 3 | An element which forms rust on exposure to moist air | 4 | Both brass and bronze are alloys of the element |
| 5 | A very reactive non–metal stored under water | 6 | The metal which exists in the liquid state at room temperature |
| 6 | Zinc metal when treated with dilute hydrochloric acid produces a gas of this element which when tested with burning splinter produces a pop sound. | 8 | An element with symbol Pb |
